Patent US4201820A successfully refreshed from Google Patents.
US4201820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microcellular heterocyclic polymer structures
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1978-01-03
•
Granted: 1980-05-06
•
Expires: 1998-01-03
Abstract
Abstract Flexible circuit articles comprising microcellular film such as films from polyparabanic acid having a conductive circuit adhered to said film.
Inventors
- 👤 Burnett H. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:10
CPC Classifications
H; H05; H05K; H05K1/00; H05K1/02; H05K1/03; H05K1/0313; H05K1/032; H05K1/0346; D; D01; D01D; D01D5/00; D01D5/24; D01D5/247; H05K1/0333; H05K2201/00; H05K2201/01; H05K2201/0104; H05K2201/0116; Y; Y10; Y10S; Y10S428/00; Y10S428/901; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24917; Y10T428/249921; Y10T428/249953; Y10T428/249978; Y10T428/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
83 words
A flexible circuit article comprising: (a) a closed cell, nonporous, non-foam microcellular polymeric article having a density of about 0.3 g/cc to about 1.5 g/cc in the shape of a film having a thickness of from about 1 mil to 20 mils, the polymeric article comprising a polymer selected from the group consisting of aromatic polyparabanic acids, aromatic polyhydantoins, aromatic polyamides, aromatic polyimides, aromatic polysulfones, aromatic polyimides-amides and combinations thereof; and (b) a conductive circuit adhered to said film in a prearranged configuration.
Claim 2
Dependent Claim
83 words
A flexible circuit article comprising: (a) a closed cell, nonporous, non-foam microcellular polymeric article having a density of about 0.3 g/cc to about 1.5 g/cc in the shape of a film having a thickness of from about 1 mil to 20 mils, the polymeric article comprising a polymer selected from the group consisting of aromatic polyparabanic acids, aromatic polyhydantoins, aromatic polyamides, aromatic polyimides, aromatic polysulfones, aromatic polyimides-amides and combinations thereof; and (b) a conductive circuit adhered to said film in a prearranged configuration.
Claim 3
Dependent Claim
13 words
A flexible circuit according to claim 1 wherein said conductive material is copper.
Claim 4
Dependent Claim
17 words
An article according to claim 1 wherein said conductive material has been electrodeposited on said film-shaped article.
Claim 5
Dependent Claim
11 words
An article according to claim 1 wherein said metal is aluminum.
Claim 6
Dependent Claim
15 words
A flexible circuit article of claim 1 wherein said polymer is an aromatic polyparabanic acid.
Claim 7
Dependent Claim
79 words
A composite semi-conductor article comprising a closed cell, nonporous, non-foam microcellular polymeric film having a thickness of from about 1.0 mil to 20 mils and a density of from about 0.3 g/cc to about 1.5 g/cc, the polymeric film comprising a polymer selected from the group consisting of aromatic polyparabanic acids, aromatic polyhydantoins, aromatic polyamides, aromatic polyimides, aromatic sulfones, aromatic polyimides-amides and combinations thereof, which film has adhered to it a prearranged configuration of a metal oxide semi-conductor (MOS).
Claim 8
Dependent Claim
79 words
A composite semi-conductor article comprising a closed cell, nonporous, non-foam microcellular polymeric film having a thickness of from about 1.0 mil to 20 mils and a density of from about 0.3 g/cc to about 1.5 g/cc, the polymeric film comprising a polymer selected from the group consisting of aromatic polyparabanic acids, aromatic polyhydantoins, aromatic polyamides, aromatic polyimides, aromatic sulfones, aromatic polyimides-amides and combinations thereof, which film has adhered to it a prearranged configuration of a metal oxide semi-conductor (MOS).
Claim 9
Dependent Claim
15 words
A composite semi-conductor article of claim 6 wherein said polymer is an aromatic polyparabanic acid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-05-06 | 1983-11-05 | 1984-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-05-06 | 1987-11-05 | 1988-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-05-06 | 1991-11-05 | 1992-05-06 | $7700.00 | Window Closed / Lapsed |